The American Idol star, who joined the legendary band alongside Brian May and Roger Taylor in 2014, took to the official Adam Lambert Twitter account to share a backstage clip from the group's London show earlier this year.

After wrapping their tour in July, Queen will kick off a 10-date Vegas residency from September 1.

Gushing over Queen's 2018 trek, Adam wrote: "We had the most incredible time performing in Europe.

"Here's a little backstage look from our time at The O2 Arena in London.

In the clip, the kooky star can be seen walking the winding corridors of the iconic venue before showing off his range of eye-catching outfits, which include a custom made silver Skingraft jacket and a bright orange leather Alexander McQueen sleeveless coat.

Chatting about taking the place of Freddie Mercury, Adam said: "When I sing Who Wants To Live Forever, I think about Freddie Mercury.

"I think about Freddie being taken away from us way too soon and being way ahead of his time.

"In a way, he is giving forever because we are still singing these songs, we are performing these songs and reminding people of Freddie.

"Freddie makes appearances during the show [via onscreen clips], we talk about Freddie."

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ICONIC: Adam Lambert joined Queen in 2014

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SUPPORT: Adam Lambert invited members of LGBTQ youth group Mosaic to his show

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IMPRESSIVE: Adam has shown fans his full tour wardrobe during the clip

“Freddie is living on through his contributions, through his art.”

Adam Lambert

The 36-year-old added: "He is living on through his contributions, through his art.

"That is one of the biggest treats to be able to do this all these years later.

"It allows someone like me who looks to Freddie as an icon, a role model and as a hero, to carry a torch for him and keep it burning."

Freddie Mercury passed away in 1991 after a contracting HIV and then AIDs.

At the time the virus was untreatable, however, after advancements in our understanding of the condition, HIV is now manageable and no longer develops into AIDs so long as medication is prescribed.